Half to feank millee



G. NORWOOD.

SPRING BENDING MACHINE;

2 Sheets-Sheet 1.

(No Model.)

- Pa 1;.ented Apr. 13, 1886.

@323 .EFEE E Wzineapea Geo a nrwoo 0i N. PETERS Phowlilhognpher.Withinmlm. D. C.

2 Sheets-Sheet 2.

(No Model G. NORWOOD. SPRING BENDI NG MACHINE.

No. 339,803. Patented Apr. 13, 1886.

N. PETERS. Plwlo-Liihcmphsr. Walhinghm. D. C.

UNITED STATES PATENT OFFICE.

GEORGE NORXVOOD, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR OF ONE- HALF TOFRANK MILLER, OF SAME PLACE.

SPRING-BENDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 339,803, dated April13, 1886.

Application filed September 16, 1885. Serial No. 177,232. (No model.)

To all whom, it may concern:

Be. it known that I, GEORGE N onwoon, a citizen of the United States,residing at Bridgeport, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements in SpringBending and Forming Machines; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention relates to certain novel and useful improvements in springbending and forming machines, and has for its object to improve on theconstruction and increase the efficiency of that class of machines shownin Letters Patent No. 301,261, July 1, 1884; and with these ends in viewmy present invention consists in the details of construction andcombination of elements hereinafter explained, and then specificallydesignated by the claims.

In order that those skilled in the art to which my invention appertainsmay fully understand its construction and operation, I will proceed todescribe the same in detail, referring by letter to the accompanyingdrawings, forming a part of this specification, in which Figure 1 is anelevation of my machine, showing the position of the several parts afterthe spring has been bent and before the return of the bending devices;Fig. 2, a detail section of the gnidejaws attached to a formerbar; andFig. 3, a view similar to Fig. 1, but with one of the bending-arms heldout of operative position and one of the auxiliary arms adjusted higherthan the other, for the purpose of shaping a coach-platform spring.

Similar letters denote like parts in the several figures of thedrawings.

A is the frame, B the carrier, C the shaft, and D the rack, alloperating as in the patent above referred to.

E are the presser or bending arms pivoted in the frame at F, and G aresprings bearing against the outer faces of said arms and adapted toreturn the latter to their closed or normal position, as set forth inmysaid Patent No. 301,261. These springs are bolted to thecarrier-frame, as shown, so as to be readily ner faces of the bars H inany ordinary manner-as, for instance, by a bolt, 0. These springs Ipreferably arrange, as shown in Fig. 3, on the inside of the bars, so asto be out of the way of the bars E.

Instead of springs, I can use cords attached to opposite bars and thenpassed around pulleys and attached to coi1-springs, as shown in Fig. 1;but I prefer the construction shown in Fig. 3.

The method of operation is the same as in my aforesaid patent; but thebars II have a special function, since when the carrier has descended sothat the bars E are spread, as shown at Fig. 1, the bars II will bedistended so as to press against the spring at points between theextremities. This is a great advantage, since it does away with thenecessity of clamping devices to hold the spring as against buckling orirregular contraction when cooled.

My present adapted for making coach-platform or half springs, and inaccomplishing this I proceed as follows: Only half of V the former-barsN is set up, and the former M and spring 0 are placed in properposition, as shown at Fig. 3. One of the bars II is pivoted in a higherplane, so that it will not extend too far beyond the inner end of thespring after the carrier has descended.

It will be readily understood that but one of the bars E is utilized,and therefore the spring which retains the other is removed, and thelatter is simply rested upon any suitable peg or support, d.

l? are guide-jaws attached to the extreme ends of the former-bars bymeans of a rightand-left-handed screw, Q. These jaws slightly overlapthe upper surface of the bars, as shown at Fig. 2.

improvement is. especially R are set-screws passed through the lowerends of the jaws and adapted to bear against the bars. The function ofthese screws is to take up any lost motion of the jaws after a springhas been placed between them.

To accommodate springs of different width, the jaws are caused to spreador close by the manipulation of the screw Q.

My invention produces a machine which can bend and shape any style ofspring, both full and half length, and this in itself is ofgreat'importance, since the saving of labor alone is a considerableadvantage.

Having thus described myinvention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a spring bending and forming machine, the reciprocating carrierhaving pivoted thereto two pairs of presser-bars, one within the other,the inner bars being shorter and having their pivotal point below thatof the other bars, each pair adapted to be distended against the actionof springs or equivalents by the downward movement of the carrier,substantially as set forth. 2. In a spring bending and forming machine,the combination, with the carrier having pivoted thereto the mainpresser-bars, of

intermediate resser-bars adjustably pivoted to a cross-piece of saidcarrier inalower horizontal plane thanthat in which the pivotal point ofthe main bars is located, substantially as shown and described.

In testimony whereof I afiix my signature in presence of two witnesses.

, GEORGE NORWOOD.

I \Vitnesses: 7

S. S. WILLIAMsON, W. T. HAVILAND.

